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4.10: Isosceles Triangles

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

TermDefinition
Base Angles The base angles of an isosceles triangle are the angles formed by the base and one leg of the triangle.
Base Angles Theorem Converse The base angles theorem converse states if two angles in a triangle are congruent, then the sides opposite those angles are also congruent.
Isosceles Triangle Theorem The Isosceles Triangle Theorem states that the perpendicular bisector of the base of an isosceles triangle is also the angle bisector of the vertex angle.
Triangle Sum Theorem The Triangle Sum Theorem states that the three interior angles of any triangle add up to 180 degrees.
Vertical Angles Vertical angles are a pair of opposite angles created by intersecting lines.

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Difficulty Level:
At Grade
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Date Created:
Jul 17, 2012
Last Modified:
Oct 05, 2016
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MAT.GEO.342.L.2